Positioning device for collapsible luggage trolleys

Abstract

A positioning device is provided for a luggage trolley having a pair of outer tubes, a pair of inner tubes respectively, telescopically received in the outer tubes, and a handle connected to upper ends of the inner tubes. The positioning device includes a connecting rod pivotably mounted in each inner tube, a manually operable actuating member mounted to the handle and connected to an upper end of each connecting rod to urge pivotal movement of the connecting rod, and an engaging member mounted in each inner tube. Each engaging member is pivoted to be disengaged from an associated engaging hole of the associated outer tube when the actuating member is actuated to allow vertical movement of the inner tubes in the outer tubes. Each engaging member is biased to selectively engage with one of the engaging holes when the actuating member is released so as to position the inner tubes in the outer tubes.

What is claimed is: 
     
       1. A positioning device for a luggage trolley of the type having a pair of outer tubes, a pair of inner tubes respectively, telescopically received in the outer tubes, and a handle means connected to upper ends of the inner tubes, each said outer tube including a plurality of vertically spaced engaging holes, the positioning device comprising: a connecting rod pivotably mounted in each said inner tube and having an upper end and a lower end;   a manually operable actuating means mounted to the handle means and connected to said upper end of each said connecting rod to urge pivotal movement of said connecting rod;   an engaging means mounted in each said inner tube and securely connected to said lower end of an associated said connecting rod to pivot therewith, each said engaging means including an engaging member releasably, selectively engaged in one of the engaging holes of an associated said outer tube; and   means for biasing each said engaging member to engage with one of the engaging holes of the associated outer tube;   wherein each said engaging member is pivoted to be disengaged from an associated engaging hole of the associated outer tube when the actuating means is actuated to allow vertical movement of the inner tubes in the outer tubes, and each said engaging member is biased to selectively engage with one of the engaging holes when the actuating means is released so as to position the inner tubes in the outer tubes.   
     
     
       2. The positioning device according to claim 1, further comprising a press button mounted to the handle means to manually actuate the actuating means. 
     
     
       3. The positioning device according to claim 2, further comprising a torsion spring mounted to the upper end of each said connecting rod for returning the connecting rod and the actuating means. 
     
     
       4. The positioning device according to claim 1, wherein the engaging member includes a dome releasably, selectively engaged with one of the engaging holes. 
     
     
       5. The positioning device according to claim 4, wherein the engaging means includes two half pieces for containing the engaging member therein, and wherein one of the half pieces has a slot through which the dome extends. 
     
     
       6. The positioning device according to claim 5, wherein the other one of the half pieces includes a receptacle defined therein for receiving the biasing means and an end of the engaging member which bears against the biasing means.